There are three Exotic Swords that you can equip in Destiny: The Taken King. They’re an all new class of item in the game. Previously, you could only equip the sword dropped by Crota in one of the game’s early missions.
Anyway, one Destiny fan named D3DP on reddit has taken his fandom a little bit further than the rest of us by 3D printing all three swords.
If you have a 3D printer of your own, you can download the blueprints here.